Insulating means



May 18 1926. I 1,585,404

C. T. MELVIN INSULATING MEANS Filed April 28, 1925 2 Sheet --SheeaINVENTOR @AMZ JMQ BY ATTORNEY May 18 1926. 1-,585,404

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ATTORNEY Patented May 18, 19.26.

UNITED S'E'Tfi p 1,585,4t4 rarest" orrics.

CHARLES 'I. MELVIN, F AURORA, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,'IO STANDARD GAS EQUIPMENT GORPGBATION 0F MARYLAND.

INSULATING MEANS.

Application filed. April 28, 1925.

My invention relates to thermal insulated lining for receptacles suchas, ovens, refrigerators, etc., and its novelty resides in theconstruction, ada station and method of using the parts.

It is an important .desideratum in linings of this character that theybe of such construction, that will afford permanent maximum insulationand be readily assembled or dissembled, without the use of specialtools.

In an embodiment of the invention here in, I have shown an adaptation ofthe lining to an electric oven. Here the lining is shown as comprising aset of six K. D. sections of welded steel tank construction, from whichthe air has been exhausted, and the tank sealed, so as to maintain acontinuous vacuum. The top and bottom sections are alike. The rearsection is provided with two open ings for terminal plugs, and one venthole adapted to communicate with a vent pipe in the oven receptacle. Therear section is further provided with four spring cat-ch lugs embossedon the inside surface, the purpose of which will be hereinafterdescribed.

The two side sections are identical, each being provided with rackcleats, which are stamped from a sheet of metal of same size as thesection and preferably spot-welded thereto. The front or door section isadapted to be bolted to the door frame of the receptacle.

In the drawings: 1

Fig. 1 is a dissembled perspective viewof the six sections comprisingthe receptacle lining,

Fig. 2 is a horizontal section through an oven receptacle, showing thesections in position and as indicated on the line 22 in Fig. 3, andlooking in the direction of the arrows. One of the sides is indicated inbroken lines showing the method of swing ing same into place,

Fig. 3 is a vertical longitudinal section of the receptacle withsections in place, and

Fig. 4 is a vertical transverse section as indicated on the line 14 inFig. 3 and looking in the direction of the arrows.

Similar reference characters refer to similar parts throughout theseveral views of the drawings.

The set of linings comprise a top section 10, a bottom section 11, twoside sections 12 and 13 respectively, a rear section 14: and a SerialNo. 26,562.

front or door section 15. The. top and bottom sections are alike and areformed from two pieces of sheet metal 10 and 11 and 11 respectively,each sheet being provided with a peripheral flange 10 and 10 and 11 and11 respectively, adapt-ed to fit one within the other so as to formchambers 10 and 11 respectively and to he hermetica ly joined bysuitable means such as roll or acetylene welding.

The two side sections 12 and 13 respectively are alike and resemble topand bottom sections 10 and 11in that they are made from two pieces ofsheet metal 12*, 12 and 13 13", respectively, each sheet being providedwith a flange 12, 12 and 13", 13 respect-ively and a chamber 12 and 13respectively. In addition each of the sections 12 and 13 has securedthereto a stamped metal sheet 12 and 13 provided with upstanding flanges12 and 13 respectively, constituting rack cleats, for the support ofracks within the oven.

The rear section let is formed of a plate 14* and provided with aperipheral flange 14". This plate 14 is provided with two positelydisposed. openings 14; and-14 for terminal plugs, and a vent opening14", ad jacent the upper left hand corner. Four spring lugs are providedand adapted to engage the inner ends of the side sections 12 and 13respectively when the oven lining is assembled. An insulated portion lt- (Fig. 3) is secured to the rear of the plate i l" as by spot-welding.This portion is of smaller area and when centrally located on the plate14, there is formed a channel around the edge of the plate. In thischannel are located the openings lt and 1 1 vent 1e and the spring lugs1 9. The portion 1 1 is formed from two pieces of sheet metal 14* and 11 each sheet being provided with a. peripheral flange 14 and 14respectively and adapted to it one within the other so as to form ahermetically sealed chamber 148 as heretofore described.

A front or door section 15, comprises a flat plate provided with beltholes 15 one in each corner. Centrally located on the rear of the plate15 is a rectangular cup shaped member 15, provided with a peripheralflange 15 which contacts with the plate 15* and is welded thereto toform a hermetially sealed chamber 15*. Each section having been made,the air is removed therefrom -lUt) and sealed so as to provide as nearlyas complete a vacuum as possible.

The sections are now ready to be assembled within the receptacle orelectric oven 16 as herein illustrated. This structure may be ofbox-like form open at one end. The rear wall is provided with inlets 16and 16 corresponding to the openings 1& and li in the rear section 14.There may be also a vent opening 16 correspondin to the vent 14 in therear section. The rront or open end 16 of the receptacle is providedwith an inturned peripheral flange 16 the purpose of which will behereinafter described. A. reinforcing or finishing ring 16 is secured tothe front wall 16 around the opening, and to this ring 16 is hinged adoor frame 17 provided with the usual ornamental plate 17.

To assemble the lining within the receptacle proceed as folloivs:hirstthe bottom section 11 is placed in the receptacle, then the top 1.0,both being located under the flange 16 of the receptacle, which servesto hold the sections in place. While the top 10 is being held up by onehand and the flange 16 the rear section 14 can be pushed into the rearor" the receptacle 16 and against the rear wall 16. One 01"- the sidesections 12 may now be placed behind the flange 16 and swung intoposition, passing the spring lugs 1 1 in the rear section 1 1-. (Clearlyshown in broken lines and arrow in Fig. The other side section 13 may beplaced in position in the same way.

The door section 15 is then secured to the door frame 17 by bolts 17which pass through bolt holes 15 in the door section. This completes theassembly and all of the sections are securely locked in place, theinterior presenting a trim appearance, tree from projections or widecracks.

By reversing the foregoing procedure, the oven lining may be easily andquickly disassembled and therefore any part "eplaceable, should it looseits vacuum or become impaired out its usefulness in any other manner.

What I claim and desire to cover by Letters Patent is follows:

1. In an oven of the kind described, a vacuum shell arranged to fit thetop supported by a flange, a vacuum shell to it the rear, spring lugs insaid rear shell, vacuum shells to fit the sides and bottom, the saidshells supported by a flange and said spring lugs.

2. In an oven of the kind described, a vacuum shell arranged to lit thetop supported by a flange, a vacuum shell to fit the rear, spring lugsin said rear shell, vacuum shells to fit the sides and bottom, the saidshells supported by a flange and said spring lugs, the side shellshaving rack cleats to support racks in the oven.

In an oven of the kind described, a vacuum shell. aTanged to fit the topsupported by a flange, a vacuum shell to fit the rear, spring lugs insaid rear shell, vacuum shells to fit the sides and bottom, the saidshells supported by a flange and said spring lugs, and a door with avacuum shell mounted thereon and adapted to close the front wall of saidoven.

1. In an oven of the kind described, a v euum shell arranged to fit thetop supported by a flange,.a vacuum shell to tit the rear, spring lugsin said rear shell, vacuum shells to fit the sides and bottom, the saidshells supported by a flange and said spring lugs, the side shellshaving rack cleats to support racks in the oven, and a door with a.vacuum shell mounted thereon and adapted to close the front wall of saidoven.

5. In an oven of the kind described, vacuum shells movably mountedtherein, sup porting means, recesses in said shells and said shellsjoined to the walls ot the said oven and forming dead air spacesbetweenthe walls of said oven and said shells.

6. In an oven of the kind described vacuum shells mounted on the bottom,top, sides and rear wall of said even, recesses in said shells and saidrecesses mounted adjoining the walls of said oven to form dead airspaces.

7. In an oven of the kind described vacuum shell units co-extensive withthe top, bottom, sides and rear wall of said oven, a recess in each ofthe said units formed by a peripheral flange supporting means and saidvacuum shells mounted adjacent the interior of said oven to term deadair spaces.

8. In an oven of the kind described, in sulating means comprising bothvacuum shells and dead air spaces, the latter formed by recesses in saidshells and supporting means.

9. In an oven of the kind described, insulating means comprising bothvacuum shells and dead air spaces, the latter formed by recesses in saidshells and supporting means comprising in part said vacuum shells.

10. In an oven of the kind described, insulating means comprising bothvacuum shells and dead air spaces, the latter formed by recesses in saidshells and supporting means, and said shells movably mounted in saidoven.

In witness whereof, I have hereunto set my hand this 21st day of April,1925.

CHARLES T. MELVIN.

